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Study on Influence Factors of Wet Air Oxidation of Highly Concentrated Emulsification Wastewater

Xinping Zeng

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Abstract

A systematic study on wet air oxidation (WAO) of highly concentrated emulsification wastewater was performed in a 2 L high-pressure batch autoclave,with emphasis on the removal effect of COD_(Cr),TOC and influence factors.The experimental results indicated that the temperature was the key factor and the best feasible temperature was 220 ℃,and that 86.4% of COD_(Cr) and 79.5% of TOC (initial COD_(Cr) 48 000 mg/L) in the wastewater were removed in 2 h.Oxidation was restricted without enough oxygen,it was fitting when the supply of oxygen was (1.0～1.25) p(O_2)~*.WAO had a good performance in the treatment of emulsified wastewater in a wider range.The pH of input water had little influence on the oxidaton efficiency.

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What this paper is about

A systematic study on wet air oxidation (WAO) of highly concentrated emulsification wastewater was performed in a 2 L high-pressure batch autoclave,with emphasis on the removal effect of COD_(Cr),TOC and influence factors.The experimental results indicated that the temperature was the key factor and the best feasible temperature was 220 ℃,and that 86.4% of COD_(Cr) and 79.5% of TOC (initial COD_(Cr) 48 000 mg/L) in the wastewater were removed in 2 h.Oxidation was restricted without enough oxygen,it was fitting when the supply of oxygen was (1.0～1.25) p(O_2)~*.WAO had a good performance in the treatment of emulsified wastewater in a wider range.The pH of input water had little influence on the oxidaton efficiency.

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Available abstract

A systematic study on wet air oxidation (WAO) of highly concentrated emulsification wastewater was performed in a 2 L high-pressure batch autoclave,with emphasis on the removal effect of COD_(Cr),TOC and influence factors.The experimental results indicated that the temperature was the key factor and the best feasible temperature was 220 ℃,and that 86.4% of COD_(Cr) and 79.5% of TOC (initial COD_(Cr) 48 000 mg/L) in the wastewater were removed in 2 h.Oxidation was restricted without enough oxygen,it was fitting when the supply of oxygen was (1.0～1.25) p(O_2)~*.WAO had a good performance in the treatment of emulsified wastewater in a wider range.The pH of input water had little influence on the oxidaton efficiency.

Key concepts: Wastewater, Wet oxidation, Autoclave, Chemical oxygen demand, Chemistry, Pulp and paper industry, Environmental engineering, Environmental science

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